Holder for incandescent lamps



(No Model.)

0. H. BENTON.

HOLDER FOR INGANDESGENT LAMPS.

Patented Nov. 3, 1885.

lA/Vf/VTOR 444 #403;

' 5 fia' Afforneys WITNESSES usual manner, at one end to the banda, and at UNITED STATES PATENT OFFICE.

oHAELEs H. BENTON, OF cLEvELANn, OHIO.

HOLDER FOR INCANDESCENT LAMPS.

SPECIFICATION forming part of Letters Patent No. 329,618, dated November 3, 1885.

Serial No. 153,506. (No model.)

To aZl whom it may concern:

Be it known that I, GHARLEs H. BENTON, of Cleveland, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Holders for Incan descent Lamps; and I do hereby declare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which it pertains to make and use the same.

My invention relates to improvements in incandescent-lamp holders; and it consists in certain features of construction and in combination of parts hereinafter described, and pointed out in the claims.

In the accompanying drawingsFigure 1 is a side view in elevation of an incandescent lamp and holder embodying my invention. Fig. 2 is a view in perspective of the sleeve of the holder. Fig. 3 is a view in perspective of the holder with the sleeve removed. Fig. 4 is a view in perspective of an inside plate and attachments that are secured to the holder, forming a binding-post for one of the wires. Fig. 5 is aview in perspective of the other binding post and attached spring that forms one connection with the lamp, showing also the means of securing this binding-post to the wooden part of the holder. Fig. 6 is an elevation in section of the wooden portion of the holder and supporting attachment. Fig. 7 is an elevation in section of the lower portion of the lamp and the upper portion of the holder.

A represents the lamp, the lower portion of which is cemented in the band a, in the usual manner. The filament A is secured, in the the other end to the metal piece a, that is embedded in the cement. (See Fig. 7.)

B is the wooden portion of the holder, to which is secured the sleeve 0, that when the parts are assembled embraces the band a, and is locked in amanner hereinaftershown. The sleeve 0 is provided with the ears 0, that fit over a portion of the part B, and are secured by screws, as shown in Fig. l, the bottom of the sleeve resting in the annular groove b. The part B has an annular chamber, 13, that is in open relation with the duct dleading through the plug D. This plug, as shown in Fig. 6, is threaded at both ends, and is screwedinto the part B, and is held from unscrewing by the setscrew d. This plug furnishes a convenient means of supporting the lamp, and by means of the ductd a concealed exit is had for the terminals E and E. The bindingposts G and H are secured to the part B on theinside, and much difficulty has been encountered in making such attachments durable, and at the same time having these parts detachable. To overcome this difficulty, I make the plate G and the leg of the plate H to fit the wall of the chamber B, and secure these parts, respectively, by the screws 9 and h, that pass through the wood with the heads on the outside and screw into threaded holes in the respective plates. The plate G is provided with the screw f, for securing the terminal E, that may be bent over the edge of the plate, as shown in Fig. 4, and passed through the duct (Z. A slot, 1), in the wood renders the head of the screw accessible. Athinmetal strip, F, is secured to the plate G, and passing outthrough the slot b is bent over the edges of the wood,as shown in Fig. 3, and the arrangement of parts is such that one of the ears 0 when in position presses upon the strip F, making an electrical connection therewith, and conceals the strip and slot. The contact of the sleeve 0 with the band (tcompletes the electrical connection between the terminal E and the end of the fila ment A that is attached to the band a. The terminal E is secured to the post H by the screw h, and also passes out through the duct d. To the top of the plate H is secured the spring H, that is coiled spirally and conically, as shown in Figs. 3, 6, and 7. The free end of this spring when the parts are assembled presses against the plate a, and completes the electrical connection between the terminalE and the end of the filament that is connected with the plate a, and thus forms a circuit from one terminal to the other. The coils of the spring H, by reason of its conical or conoidal form, may be compressed within each other, and the free end may thus be compressed a much greater distance than if the spring were made cylindrical. These conical or conoidal spiral springs are made to compress into a small space, and still have sufficient recoil for the purposes required, and as compactness is desirable in these holders this form of spring is important. The portion of the sleeve 0 that is adjacent to the spring has a lining, I, of any suitable non-conducting tion, respectively, being approximately longitudinal with the sleeve,while the innerportion turns at an acute angle and tends upward. As the lamp is placed in the holder and the pinsv passed to the bottom of the slots the spring H, as aforesaid, comes in contactwith the plate a and is compressed. When the lamp is turned so that the pins a pass to the end of the oblique portion of the slots, the re-' coil of the spring Hlocks the parts in thisposition, holding them firmly. With thisconstruction the holder is reduced to asmall compass, the attachments are strong and-durable, the parts are all accessible for repairs or adjustment, the electrical connections are reliable, and with, as aforesaid, the terminals concealed the deviceis ornamental and attractive in appearance, and the holder can be made at a small initial cost.

What I claim is 1. In an electric-lamp holder, the combination, with a hollow wooden part, of bindingposts secured thereto on the inside, so that the terminals are concealed, and having asa means of attachment screws with the heads abutting against the woodon the outside, and the screw ends engaging threaded holes in the respective binding-posts, substantially as set forth.

2. In an electric-lamp holder, the combination, with a binding-post, of a'spring secured thereto and arranged to form an electrical connection with one end of the filament of the lamp, and the said spring coiled spirally, and

the spiral arranged conical or conoidal in form, substantially as set forth.

3. In an electric-lamp holder, the combination,with the sleeve 0 and the spring H, each forming a part of the electrical circuit, of a lining in the sleeve of non-conducting material intermediate between the said sleeve and spring, substantially as set forth.

4, In an electric-lamp holder, the combination,with the band a, having one end of the filament electrically connected therewith, and the spring H,electrical1y connected with one of the terminals, and arranged to be electrically connected with the other end or leg of the filament, of the sleeve 0 anda pin and angular slot forming a bayonet lock for connecting sleeve 0 tothe band a, substantially as set forth.

5. In'an electric-lamp holder, the combination,wii h the-hollow wooden part B,.with binding-posts secured on the inside thereof in the manner described, and atsuitable duct or passage-way forming a concealed exit for the terminals, of the sleeve 0, provided with the ears or equivalent devices 0, arrangedto connect electrically with one of the binding-posts, and to cover suchconnecting parts and to secure the sleeve to the part B, substantially as set forth. 6. In an electriclamp holder, the sleeve 0, 

